All Tennis Players How Many Grand Slams Has Ethel Larcombe Won? Ethel Larcombe (née Ethel Warneford Thomson, 8 June 1879 – 11 August 1965) was a British female tennis player.Ethel Larcombe has won 1 Grand Slam. FacebookTwitterEmail How Many Grand Slams Has Madison Keys Won? How Many Grand Slams Has Jannik Sinner Won? How Many Majors Has John Isner Won?